Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e54704257fa98b…

MALICIOUS

PDF

74.0 KB Created: 2021-03-24 17:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d0b35b2754c45a524cdf4868fac3ff82 SHA-1: 1fc91e57d4200edac1efcc21fb0d797a24baee55 SHA-256: e4e54704257fa98ba361024a64c27c2875766304e6c8ee9802f81b2c174989c1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains an embedded URL that masquerades as a search result for "science fair projects", likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://resalured.ru/strik?utm_term=what+are+some+good+science+fair+projects+for+3rd+graders PDF link annotation
    • https://cdn.sqhk.co/jaxubefe/hcbjbGW/top_100_most_played_games_on_steam.pdfIn PDF document text
    • http://ludshop.xyz/cambium_network_software18ns1.pdfIn PDF document text
    • http://duwelizub.mywebcommunity.org/pl_sql_iterate_over_select_result.pdfIn PDF document text
    • http://esportzmlevent.com/18411531145fit4n.pdfIn PDF document text
    • http://thecabinets.xyz/sufifarivazazonativaz2hwn.pdfIn PDF document text
    • https://cdn.sqhk.co/vapatibu/h8heiam/can_you_escape_2_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxolusufa/2hhiahj/pidat.pdfIn PDF document text
    • http://felagem.getenjoyment.net/the_book_of_law_aleister_crowley.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/at_t_u_verse_channel_guide_indianapolis.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/defensa_nacional_en_cuba.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/bat_full_form_in_commerce.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/calendar_2019_november.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/ecologia_y_derecho_ambiental.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/manual_gps_garmin_nuvi_52_espaol.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73F 5580 bytes
SHA-256: 4ce06fb5861c87fb9fc9eabd2631e40b4cd8d9f85344d900a9d6dee7e9639e6d
font_01_sfnt_off0000ea2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2D 10068 bytes
SHA-256: ec740844ea46ea584331bedeaf0e5e8f02161869f70bc29ab7902994a59714a0
font_02_sfnt_off00010c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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